Is It Impetigo? Why Your Skin Is Blistering and What to Do Next

If you've noticed blisters, oozing sores, or crusty patches on your skin, you might be wondering: Is it impetigo?

Impetigo is a common and highly contagious bacterial skin infection. It affects both children and adults, and while it's usually mild, it does require proper treatment to prevent it from spreading or worsening.

Let's break down what impetigo looks like, why your skin may be blistering, and what medically approved next steps you should take.

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What Is Impetigo?

Impetigo is a superficial skin infection caused by bacteria — most commonly Staphylococcus aureus or Streptococcus pyogenes. It spreads easily through:

• Direct skin-to-skin contact
• Shared towels, clothing, or bedding
• Scratching infected skin
• Close-contact settings like schools or gyms

It often begins when bacteria enter through a break in the skin, such as:

• A small cut or scrape
• An insect bite
• Eczema or irritated skin
• A rash

While impetigo is more common in children, adults can develop it too — especially if they have compromised skin or weakened immunity.

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What Does Impetigo Look Like?

Impetigo can appear in two main forms.

1. Non-Bullous Impetigo (Most Common)

This type accounts for about 70% of cases.

Typical signs include:

• Red sores that quickly rupture
• Oozing fluid
• Thick, honey-colored crusts
• Itching or mild soreness
• Most often around the nose and mouth

The honey-colored crust is one of the hallmark signs of impetigo.

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2. Bullous Impetigo (Blistering Type)

This type causes larger fluid-filled blisters.

Symptoms may include:

• Large, fragile blisters
• Clear or yellow fluid inside
• Skin that looks red and raw after blisters burst
• Less crusting compared to non-bullous impetigo

Bullous impetigo is more common in infants and young children, but adults can develop it too.

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Why Is Your Skin Blistering?

Blistering happens when bacteria release toxins that cause the top layer of the skin to separate from the lower layers. This creates fluid-filled pockets.

However, not all blistering skin is impetigo. Other possible causes include:

• Contact dermatitis (allergic reaction)
• Eczema flare-ups
• Cold sores (herpes simplex virus)
• Shingles
• Fungal infections
• Autoimmune blistering conditions

Because several conditions can look similar, proper diagnosis matters.

If you're experiencing crusty sores, honey-colored scabs, or persistent blistering and want personalized guidance on what might be causing your symptoms, you can check your symptoms with Ubie's free AI-powered tool to get clarity and find out what to do next.

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How Serious Is Impetigo?

In most cases, impetigo is mild and responds well to treatment. However, it should not be ignored.

Without treatment, impetigo can:

• Spread to other parts of your body
• Spread to other people
• Become deeper (cellulitis)
• Rarely, lead to kidney complications (post-streptococcal glomerulonephritis)

These complications are uncommon but possible. That's why early treatment is important.

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When Should You See a Doctor?

You should speak to a doctor if:

• The rash is spreading quickly
• Blisters are large or painful
• You develop fever
• The area becomes very red, swollen, or warm
• You notice red streaks spreading from the rash
• You have diabetes or a weakened immune system
• Symptoms don't improve within a few days

Seek urgent medical care immediately if you experience:

• High fever
• Severe pain
• Rapidly spreading redness
• Signs of a serious infection

While impetigo is usually not life-threatening, any rapidly worsening skin infection should be evaluated promptly.

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How Is Impetigo Diagnosed?

Doctors typically diagnose impetigo by examining the skin. In most cases, no testing is needed.

If the infection is severe or not responding to treatment, your doctor may:

• Swab the area to identify the bacteria
• Check for antibiotic resistance

A proper diagnosis ensures you receive the right treatment.

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Medically Approved Treatment for Impetigo

Treatment depends on how widespread the infection is.

1. Topical Antibiotics (For Mild Cases)

If the infection is limited to a small area, your doctor may prescribe:

• Mupirocin ointment
• Retapamulin
• Ozenoxacin

These are applied directly to the skin for about 5 days.

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2. Oral Antibiotics (For More Extensive Cases)

If impetigo is widespread or severe, oral antibiotics may be needed.

Common options include:

• Cephalexin
• Dicloxacillin
• Clindamycin (if allergic to penicillin)

Always complete the full course, even if symptoms improve early.

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What You Can Do at Home

While waiting for medical care or during treatment, you can:

• Gently wash the area with soap and water
• Remove crusts carefully (after soaking)
• Keep nails trimmed to prevent scratching
• Cover sores loosely with gauze
• Avoid sharing towels or clothing
• Wash hands frequently

These steps help prevent spreading impetigo to others — or to different parts of your body.

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How Long Does Impetigo Last?

With treatment, impetigo usually improves within:

• 3–5 days of starting antibiotics
• 7–10 days total healing time

Without treatment, it can last several weeks and spread further.

Children can usually return to school 24 hours after starting antibiotics, as long as lesions are covered.

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Who Is at Higher Risk?

Certain factors increase your risk of developing impetigo:

• Young age (2–5 years old)
• Warm, humid climates
• Participation in contact sports
• Crowded living conditions
• Eczema or other skin conditions
• Cuts, scrapes, or insect bites

If you or your child falls into one of these categories, being proactive about skin hygiene can reduce risk.

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Preventing Impetigo

You can reduce your chances of getting impetigo by:

• Washing hands regularly
• Cleaning and covering cuts or scrapes
• Avoiding scratching insect bites
• Not sharing personal items
• Washing gym clothes and uniforms regularly

If someone in your household has impetigo, disinfect commonly touched surfaces and wash linens in hot water.

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Is It Really Impetigo?

Here's a quick summary checklist. Impetigo is more likely if you notice:

• Red sores that burst quickly
• Honey-colored crusting
• Blisters that break easily
• Mild itching or discomfort
• Lesions around the nose or mouth
• Recent skin injury or irritation

If you're still unsure about what's causing your symptoms, take Ubie's free symptom assessment to receive personalized insights based on your specific situation and discover the recommended next steps.

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The Bottom Line

Impetigo is common, contagious, and treatable. In most cases, it responds quickly to antibiotics and heals without scarring.

However, it should not be ignored — especially if it's spreading, painful, or accompanied by fever.

Blistering skin can have several causes, and not all of them are impetigo. Getting the correct diagnosis ensures you receive the right treatment and avoid complications.

If you suspect impetigo:

• Keep the area clean
• Avoid touching or scratching
• Limit close contact
• Speak to a doctor for proper evaluation

And most importantly, seek immediate medical care if symptoms are severe, rapidly worsening, or associated with fever or significant pain.

Your skin is your body's first line of defense. When it signals something isn't right, it's worth paying attention — and getting professional guidance.